Effects of low molecular-weight organic acids and dehydrogenase activity in rhizosphere sediments of mangrove plants on phytoremediation of polycyclic aromatic hydrocarbons

Chemosphere ◽  
2014 ◽  
Vol 99 ◽  
pp. 152-159 ◽  
Author(s):  
Yuanyuan Wang ◽  
Ling Fang ◽  
Li Lin ◽  
Tiangang Luan ◽  
Nora F.Y. Tam
Keyword(s):  
Molecular Weight ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Organic Acids ◽  
Dehydrogenase Activity ◽  
Aromatic Hydrocarbons ◽  
Low Molecular Weight ◽  
Mangrove Plants ◽  
Polycyclic Aromatic

Low molecular weight organic acids enhance the high molecular weight polycyclic aromatic hydrocarbons degradation by bacteria

Chemosphere ◽  
2019 ◽  
Vol 222 ◽  
pp. 132-140 ◽  
Author(s):  
Anithadevi Kenday Sivaram ◽  
Panneerselvan Logeshwaran ◽  
Robin Lockington ◽  
Ravi Naidu ◽  
Mallavarapu Megharaj
Keyword(s):  
Molecular Weight ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Organic Acids ◽  
High Molecular Weight ◽  
Aromatic Hydrocarbons ◽  
Low Molecular Weight ◽  
Polycyclic Aromatic

scholarly journals Using Low Molecular Weight Organic Acids to Enhance Microbial Degradation of Polycyclic Aromatic Hydrocarbons: Current Understanding and Future Perspectives

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 446
Author(s):  
Lei Zhang ◽  
Jie Qiao ◽  
Haiyang Cui ◽  
Minghui Wang ◽  
Xiujuan Li
Keyword(s):  
Molecular Weight ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Organic Acids ◽  
Microbial Degradation ◽  
Aromatic Hydrocarbons ◽  
Current Understanding ◽  
Low Molecular Weight ◽  
Future Perspectives ◽  
Polycyclic Aromatic ◽  
The Impact

Polycyclic aromatic hydrocarbons (PAHs), an organic pollutant with persistence and carcinogenicity, are universally present in the environment and food processing. Biological approaches toward remediating PAHs-contaminated sites are a viable, economical, and environmentally friendly alternative compared to conventional physical and/or chemical remediation methods. Recently, various strategies relating to low molecular weight organic acids (LMWOAs) have been developed to enhance the microbial degradation of PAHs. However, the remaining challenge is to reveal the role of LMWOAs in the PAHs biodegradation process, and the latter limits researchers from expanding the application scope of biodegradation. In this mini-review, we summarized the current understanding of the impact of LMWOAs on (1) the physicochemical behavior of PAHs in the extracellular environment; (2) the interactions between PAHs and the microbial cell surface; and (3) the intracellular metabolization of PAHs. Future perspectives for this field are discussed in this review as well.

scholarly journals The significance of pyrogenic polycyclic aromatic hydrocarbons in Borneo peat core for the reconstruction of fire history

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0256853
Author(s):  
Sher-Rine Kong ◽  
Masanobu Yamamoto ◽  
Hasrizal Shaari ◽  
Ryoma Hayashi ◽  
Osamu Seki ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Fire History ◽  
Low Molecular Weight ◽  
Aromatic Rings ◽  
Peat Core ◽  
Polycyclic Aromatic ◽  
Core Depth ◽  
Similar Depth

The reconstruction of fire history is essential to understand the palaeoclimate and human history. Polycyclic aromatic hydrocarbons (PAHs) have been extensively used as a fire marker. In this work, the distribution of PAHs in Borneo peat archives was investigated to understand how PAHs reflect the palaeo-fire activity. In total, 52 peat samples were analysed from a Borneo peat core for the PAH analysis. Pyrogenic PAHs consist of 2–7 aromatic rings, some of which have methyl and ethyl groups. The results reveal that the concentration of pyrogenic PAHs fluctuated with the core depth. Compared to low-molecular-weight (LMW) PAHs, the high-molecular-weight (HMW) PAHs had a more similar depth variation to the charcoal abundance. This finding also suggests that the HMW PAHs were mainly formed at a local fire near the study area, while the LMW PAHs could be transported from remote locations.

scholarly journals Polycyclic Aromatic Hydrocarbons (PAHs) in water of Al-Kahlaa River in Missan Province, Iraq

2016 ◽  
Vol 21 (1) ◽  
pp. 1
Author(s):  
Salih Hassan Jazza ◽  
Abdul Hussain Y. Al-Adhub ◽  
Hamid T. Al-Saad
Keyword(s):  
Molecular Weight ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Dry Weight ◽  
Reference Station ◽  
Low Molecular Weight ◽  
Treatment Unit ◽  
Tigris River ◽  
Polycyclic Aromatic ◽  
Total Concentrations

The present study was performed to have knowledge of Polycyclic Aromatic  Hydrocarbonspollution status in water. The samples were collected during two seasons (winter and summer 2012 ,2013) from four different stations) Al-Magideh, Treatment unit, Al-Husaichi and Al-Zubair) distributed along Al-KahlaaRiver in Missan province, in addition to reference station lies on the Tigris river before  25 Km  from entering to Amara city. The concentrations of PAHs were determined in by using capillary Gas Chromatography. Results of the present  study revealed that the total concentrations of PAHs  in dissolved fraction  ranged from 0.739 ng.l-1 in Reference station to 1.974 ng.l-1 in Treatment unit during winter, and from 0.300 ng.l-1 in Reference station to 1.125 ng.l-1 in Treatment unit during summer, while in the particulate fraction they varied from 0.79 ng.g-1 dry weight in Reference station to 24.42  ng.g-1 dry weight in Treatment unit during winter, and from 4.369 ng.g-1 dry weight in Reference station to 10.545 ng.g-1 dry weight in Al-Husaich during summer. It had been noticed that there were a predominance of high molecular weight PAHs on low molecular weight, while  BaA/(BaA+Chr) ratio in water ranged from 0.218 to 0.804. InP/(InP+BghiP) ratio ranged between 0 and 0.578,whereas Fl/Pyratio ranged between 0.150 and 2 ,this give an indication of  the origin  of PAHs compounds in water which were mainly pyrogenic and few from them  petrogenic. Keywords: polycyclic aromatic hydrocarbons, PAHs, water, pollution

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